为了获得连续精细的整层大气光谱透过率, 将光栅光谱仪与高精度二维跟踪机架相结合, 研制了能够进行连续波段测量的太阳辐射计。通过小波变换对光谱进行去噪与基线校正, 减小了仪器结构设计的复杂度。鉴于Langley标定法与标准光源法各自的局限性, 提出了一种将二者结合的混合标定法, 将标定基准溯源至大气层外的太阳辐照度。将所提系统与POM-2辐射计进行了同时同地的对比实验, 并且将实验结果与大气辐射传输软件MODTRAN的计算结果进行了对比, 对比结果验证了仪器结构设计的可靠性与标定方法的准确性。

In order to obtain continuous spectral transmittance of total atmosphere with high accuracy, a sun-photometer is developed based on the combination of grating spectrometer and high precision two-dimensional rotating frame. We can use the wavelet transformation to achieve spectral denoising and baseline correction, and the design complexity of the instrument structure is reduced. A mixed calibration method which combines Langley calibration method and standard light source method is introduced in consideration of limitations of the two methods above mentioned. The base of calibration can be traced to the extra-atmospheric sun irradiance. A comparative experiment between the sun-photometer and the POM-2 photometer is carried out at the same place and time, and the subsequent comparative analysis is also made between data measured by the sun-photometer and data obtained by the MODTRAN software. The experiment indicates the reliability of instrument structure design and the high precision of the new calibration method.